org/ojs/index.php/eljc/article/download/ds16/pdf . Erdős, Paul; Rényi, Alfréd; Sós, VeraT. (1966), “On a problem of graph theory”, Studia Sci. Math. Hungar. 1:
umlaut which also exists in Hungarian.", from Paul Erdős, D. Miklós, VeraT. Sós (1996). Combinatorics, Paul Erdős is eighty ^ Cited in at least 20 books
1007/978-1-4939-2969-6. ISBN 978-1-4939-2968-9 Laczkovich, Miklós; Sós, VeraT. (2015). Real Analysis: Foundations and Functions of One Variable. doi:10
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